Run Steam and NFS Unbound as an admin. Run the System File Checker tool then Check for Windows and GPU updates. Troubleshooting Graphics issues. Verify any Anti-virus, or other software is not limiting the client and game (try closing out of additional apps then trying to play) More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.